Worksheet: Applications of Electromagnetic Waves

In this worksheet, we will practice describing the uses of different types of electromagnetic radiation in a variety of applications and technologies.

Q1:

Which of the following would be a typical application of ultraviolet radiation?

  • AHeating objects
  • BImaging the interiors of objects
  • CTransmitting signals through fiber cables
  • DProducing fluorescence

Q2:

Which of the following statements does not correctly explain why infrared radiation is more useful than visible light when searching for survivors of accidents where buildings collapse with people inside them?

  • AInfrared radiation can be detected in darkness as easily as in well-lit conditions.
  • BInfrared radiation emitted by living things because of their temperature makes it easier to tell them apart from their lower temperature surroundings.
  • CInfrared radiation from the breath of the people trapped can be detected, and this can help in locating them.
  • DInfrared radiation is transmitted through solid objects much better than visible light is.

Q3:

Which of the following statements correctly explains why microwave ovens strongly heat food inside them but do not strongly heat the glass plates that the food rests on?

  • AFood has a higher density than glass so it absorbs more microwave energy.
  • BGlass reflects microwaves better than food does.
  • CGlass emits microwaves more easily than it absorbs them.
  • DMicrowaves are more strongly absorbed by water molecules than by molecules in glass.

Q4:

Which of the following would be a typical application of gamma radiation?

  • AProducing fluorescence
  • BHeating objects
  • CTransmitting signals between Earth and space
  • DKilling cells and organisms

Q5:

Which of the following would be a typical application of X-ray radiation?

  • AProducing fluorescence
  • BHeating objects
  • CTransmitting signals between Earth and space
  • DImaging the interiors of objects

Q6:

Which of the following would be a typical application of visible radiation?

  • AProducing fluorescence
  • BBroadcasting signals over Earth through the atmosphere
  • CTransmitting signals between Earth and space
  • DTransmitting signals through fiber cables

Q7:

Which of the following would be a typical application of infrared radiation?

  • AProducing fluorescence
  • BTransmitting signals between Earth and space
  • CImaging the interiors of objects
  • DHeating objects

Q8:

Which of the following would be a typical application of microwaves?

  • AImaging the interiors of objects
  • BProducing fluorescence
  • CTransmitting signals through fiber cables
  • DTransmitting signals between Earth and space

Q9:

Which of the following would be a typical application of radio waves?

  • AProducing fluorescence
  • BHeating objects
  • CImaging the interiors of objects
  • DBroadcasting signals over Earth through the atmosphere

Q10:

One or more of the following statements correctly describe the difference between how food is cooked using infrared radiation and using microwaves, as shown in the diagram, where heating is shown by redder parts of the diagram. Which are the correct statements?